Dating New England: A Collaborative Study of the Timing of Metamorphism, Assembly, and Exhumation of the Central New England Orogen

0073754 Cheney 0073747 Spear新英格兰的地质学研究由来已久，泥盆纪北东造山运动期间中新英格兰的演化被广泛理解为泥盆纪早期的碰撞事件。 然而，有一些问题的变质作用，组装和折返的时间，这是具有根本意义的挤压造山带的发展，这和任何挤压造山带。 该项目将采用强大的新的年代测定技术，提供在经典的古希腊研究中无法获得的详细的年龄控制。 预计这些结果将有助于在构造框架中确定变质作用高峰期的时间，评估沿着走向发生时间-海侵变质作用的可能性，并评估产生反转变质序列的情况。 虽然集中在他们的经典造山带，这些关系的知识是适用于发展模式的所有造山带的演变。

0073754 Cheney0073747 SpearNew England has long been studied geologically, and the evolution of Central New England during the Devonian Acadian Orogeny is broadly understood as an early Devonian collisional event. However, there are a number of questions about the timing of metamorphism, assembly and exhumation of this terrane that are of fundamental significance in the development of this and any compressional orogen. This project will employ powerful new techniques of age dating to provide the detailed age control that was not available during the classic Acadian studies. Results are expected to help place the timing of peak metamorphism in a tectonic framework, to assess the possibility of time - transgressive metamorphism along strike and to evaluate scenarios for producing inverted metamorphic sequences. While focused on their classic orogen, knowledge of these relationships is applicable to developing models for the evolutions of all orogenic belts.